Lifting device for draft implements



A. C. JOHNSON. LII-TING DEVICE FOR DRAFT IMPLEMENTS) APPLICATION FILEDMAYZG. I919.

Patented Oct. 26, 1920.

2 SHEETSSHEET 1- WITNESS v j INVENTOR WQM 1 35 3 63;

A TTORNE YS A. C. JOHNSON. LIFTING DEVICE FOR DRAFT IMPLEMENTS.

APPLICATION FILED MAY 26. 1919.

' Patentd Oct. 26,

1920. 2 SHEETSSHEET 2.

A TTOR NE YS m/M H m Mfl My ems-D srrss PATENT orrics.

ALFRED C. JOHNSON, OF SAN JOSE, CALIFORNIA. v i

I LIF TING DEVICE FOR DRAFT IMPLEMEN 'TS.

To all whom it may concern Be it known that I, ALFRED JoHNsoN, a citizenof the United States, residing at San Jose, in the county of Santa Claraand State of California, have invented certain new and usefulImprovements in Lifting Devices for Draft Implements, of which thefollowing is a specification. My invention relates to a lifting devicefor vehicles and implements.

One object of my invention is to provide device for the purpose, whichis strong, simple to operate, and cheap to construct.

Myinvention is herewith described and illustrated as applied to acultivator, but it is to be understood that it is equally well adaptedfor use in connection with other vehicles and implements. The device isentirely self-contained and may be attached to any vehicle or implementwithout alteration thereof as it is not built into the structure nornecessarily a permanent part thereof.

My invention will now be fully described with reference to theaccompanying drawings, wherein:

Figure 1 is a side elevation of my l1ft1ng device as applied to acultivator.

Fig. 2 is aplan View of the same. Fig. 3 is a detailed side-view,enlarged, of a portion of my lifting device, showmg the lifting crankand connecting link.

Fig.4 is a View similar to Fig. 3, the crank and connecting link beingremoved to .show

a portion of the clutch and operating mechv anism therefor.

1 designates the frame of a draft implement, here shown asa cultivator,having teeth.or blades 2, and wheels 3 adapted to support the forwardend of said frame. A yoke member 4, secured to the frame 1 carries avertically disposed rotatable screw 5, operated by means of a hand wheel6, Figs. 1 and2.

A"'bracket 7 is threaded and supported on saidscrew and has journaled init by a Specification of Letters Patent. I Patented Oct, 26 1920,Application filed May 26, 1919. Serial No. 299,827. I

transverse portion 8' a rearwardly extendmg arm 8, Fig. 2, adapted forvertical swing ng movement.' The rear of said arm 8 carries atransverse, horizontal axle spindle 9, upon which is mounted a freelyrotatable ground-running wheel 10, Figs. 1 and 2.

The spindle 9 has mounted upon freely rotatable sleeve 11 which carriesa cam 12 and a crank 13, Figs. -1, 2 and 3. A clutch member 14, Figs. 2and 4, is slidably it a' mounted on the sleeve 11, and is caused ,to

rotate therewith by a key or feather lfi, F g. 4. Said clutch member 14is provided with teeth upon its face adapted to engage co-acting teethformed upon the face of the hub 16 of the-wheel 10, Fig. 2.

Engagement of said teeth sliding the clutch member 14 longitudinallyupon the sleeve 11. For this purpose said clutch member is provided witha groove 17 Figs. 2 and 4, in whichthe endsof a yoke 18 ride. Said yokeis carried upon avertical' plvot- 19, Fig. 2, and is provided with alug;

is effected 20, Figs. 3 and 4, adapted to be engaged by a'finger 21 onthe lower end of'a ever 22. Sa1d lever ispivoted at 23, and has arearwardly extending arm 24 carrying a roller,

25 adapted'to ride upon the cam 12, Figs. 1 and 3. A spring 26 normallyholds the yoke 18 over in, such a position that the clutch member .14 isdisengaged from the wheel10.

The cam 12 is formedwith two diametrically opposite depressions-'27. Anarm 28, secured to the projecting free end ofv the transverse 'journaledportion 8 of the arm 8, and extending rearwardlytherefrom, supportsthe'pivots19 and 23 of the clutch oke 18 and the lever22 respectively. Aink 29, Figs. 1, 2 and 3, connectsthe crank 13with'an inwardly directedarm 30 of the bracket 7.

Under normal conditions, the wheel 10'revolves in running upon theground, and the clutch member 14, the cam 12 and the crank 13 remainstationary in the position shown in the drawings. When it is'desired tolift the cultivator to free its teeth from the ground, the lever 22 ismoved forwardly,

thus causing, by the contact of its finger 21;

with the lug 20, the side swing, of theyoke 18 on its ivot 19, andthismovement of the yoke sides the clutch member 14 into engagement withthe clutch-hub 16 of the wheel 10; andeat the same time 24 lifts the,cam roller 25 out of the .def fission 27iirit e caei 1a, The .12 anthecrank 13 being, now connected through their sleeve 11 and the clutchmembers, with the wheel 10, rotate withjs'aid wheel. it

The roller v25, riding upo ',;the c1rcular elevated portion of thecamj12,holds. t h e 1ever22 iii the forward pOSii iQii and causes theclutch member l l, to remain in'en ag'e ment with the wheel IQ; for; ahalf revolntion, when saidrollejr- 25 dropping nto, 0 posite depression27 of the cam 12, eii'ects the release of sa clutch and allowsthe crank13 to com" to rest. Duringthist me, however, sai d has made a: halfrevolm tion from the position shown-1n the drawings, thiis; through thelink 29; and arm 30,

lifting the bracket 7, and thereby rais ng the entire rear end- .ofthecultivator. S a 1 d cultivator is lowered by a imilar operat on, thecrank 13 traveling through another half revolution.

A spring 31, Figs; 1 and 2 extends, under tension,-'between' brackets 32and 33, the former secured to the frame 1 of the cult vator and thelatter to the arms 8; -S a1d spring causes the wheel 10 to normallycarry a portion of the Weight of the cnltiyator, thereby giving saidwheel suffic ent nit al traction to enable ,it to begin to liftthecultivator withoutslipping, When thelittang movement has startedtheentire we ght of the rear'end of the cultivator is thrown upon thewheel 10; giving it ample traction to continue the operation. Thisspring 31 is however not essential to the working of the device nor itss'elt-contaiiiefd charactenr p. The bracket 7 being carried by thevert1- cal screwfi, is not only adjustable vert cally,

to re ulate the height of the ciil tivatorwith respect to the ground,but it also has a lateral swin ing movement to enable the wheel 10 totrack properly when operatlng on a curve.' i I, '1 t Itisto benotedgthat my device as here n illustrated raises the rear end of thedraft implement. -Thi is of particular advantage o plows t v tors, mel Srew S and E i 1ike',-fojr the reason hat ltjenables the o t or edge ofsuch imp1en1ent to enter the ground much more readilvcwhen said rear endis againf lowered, thannwould be the case if the forward end of the.implement wer r or if th v n r mbl ent we raised. But it is to, beunderstood that this location is not imperative nor essential; as I thedevice being self-contained maybe attached to the implement in anyposition desired; and may be removedfrom one implement and placed onanother; nor is In inveiition to be confined to a single 1i ting wheel.I r

I claim: 1 I I I 1. A lifting device for implements com- 123A liftingdeprising a member, means for attaching said member to the implementadapting it for vertical adjustment and lateral pivotal movement, aswingingarm carried by said member; a ground-running wheel carried bysaid arm; connections between said wheel and said member wherebysaid memher is lifted by the rotation of said wheel; and means for throwing saidconnections mp: n out a i np I or'iinplements comprisingaa member meansforisecuring said member to the implement adapting it for verticaladjustment and lateral pivotal -movement, an armhavin at one' end atransverse portion jonrnaled in said member adapting it for verticalswinging movement, and having other end a spindle at right aiigles, aground-ruIming wheel rotatably carried b said spindle; a crank rotatablycarried, by said spindle and norinally free of said wheel; means forcausing said crank to rotate with said wheel;

and a connection between said crank and said member whereb" said memberis lifted by. the rotation 0 said crank.

3. lifting device for implementscomprising. a yoke secured to theimplement; a vertically disposed screw rotatably mounted in sai yoke; amember fitted .on said screw for vertical adjustment and lateralmovement; an arm pivotally mounted in said member; a ground-runningwheel rotatablycarriedby said'arm; a' crank r'otatably carried said armand normally free of the w eel-,;- means for throwing said crank into,and out of rotative connection 'with the wheel means connecting thecrank with said member to lift said member and the implementby therotation" of the crank; and means associated with. said crank forautomatically throwing said-connections into and out of action.

4. A lifting de ic for implements comprising a member secured, to theimplement;

means jfor vertically adjusting said me'in-J' ber; arr arm pivotallymounted. in vsaid member; a ground-running wheel rotatably carriedbysaid arm; a crank rotatably. carried said am and normally free of themany free of said wheel; a clntch for connecting s aid crank in drivingrelation with said wheel; means for manually engaging said clutch; meansfor automatically releasing said clutch, and a connection between saidcrank and said member for raising the latter.

ALFRED C. JOHNSON. Witnesses -WM. F. BOOTH, S. CONS INE.

